Finding the Fourth Proportional to 10,779.81, 16,159.22 and 5,156.01

Step by Step Solution

1. Step 1: Write the proportion equation
   10,779.81 : 16,159.22 = 5,156.01 : x
2. Step 2: Convert to fraction form
   10,779.81/16,159.22 = 5,156.01/x
3. Step 3: Cross multiply
   10,779.81x = 16,159.22 × 5,156.01
4. Step 4: Simplify right side
   10,779.81x = 83,317,099.91
5. Step 5: Solve for x
   x = 83,317,099.91/10,779.81
6. Step 6: Final answer
   x = 7,729.00